SAN
User disk space at CCR is contained in a high-performance Storage Area Network (SAN).
CCR's SAN provides a total of 20TB of disk storage to the U2 cluster.
Directories are NFS mounted to the U2 cluster and accessible from all compute nodes.
- Home directories: /san/user
- Example: /san/user/UBIT-username/u2
- Default user quota is 2GB.
- Backed up to a tape library according to the CCR Backup and Retention Policy.
- Projects directories: /san/projects1, /san/projects2 and /san/projects3
- Additional disk space is available for research groups in the project directories.
- Faculty interested in project disk space should contact the CCR staff.
- The default group quota is 100GB.
- By default, there is NO backup of data in the group project directories.
- Global scratch space (2TB): /san/scratch
- Available to all users for temporary use.
- There is NO backup of data.
IBRIX
The IBRIX file system provides 25TB of high performance global scratch space. IBRIX is accessible to users while running applications. This high performance storage is recommended for applications that require significant I/O throughput. Please note that it is volatile storage and not meant to serve as permanent storage.
- /ibrix/scratch
- Accessible from all compute node in the U2 cluster.
- Available to all users for temporary use.
- Data that has not been accessed in more than three weeks is deleted nightly.
- There is NO backup of data.
Local Scratch Space
All compute nodes in the U2 cluster have local disk space (/scratch).
- This scratch space is available to batch jobs running on the cluster.
- The variable $PBSTMPDIR is set to /scratch/$PBS_JOBID.